Dynamics simulation of a profiled rod after detonation flying against air resistance
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摘要: 针对本文中提出的一种异形杆结构设计方案，建立爆轰驱动异形杆动力学模型，利用ANSYS/LS-DYNA对爆轰驱动异形杆的运动过程进行了数值模拟，获得了爆炸作用结束后产生塑性变形的异形杆模型及初速度。爆炸作用后异形杆在空气流场中运动只产生弹性变形，将杆视为柔性体，运用ADAMS软件对异形杆在空气阻力作用下的运动过程进行了数值模拟。分析结果表明，将异形杆视为柔性体，考虑爆轰作用引起的杆条塑性变形这一数值算法能更准确地描述爆轰驱动异形杆在空气阻力作用下的运动规律。Abstract: Based on the design of a profiled rod, a dynamics model was proposed for the profiled rod driven by dentonation. The motion process of the profiled rod driven by dentonation was simulated by ANSYS/LS-DYNA. The model for the profiled rod after detonation and the initial velocity were achieved. Considering the aeroelastic deformation caused by the profiled rod flying in air fluid filed, the profiled rod was regarded as a flexible body, the motion process of the profiled rod flying against air resistance was simulated by ADAMS. The computed results show that the proposed simulation method can describe the motion states of the profiled rod accurately after detonation and provide a reference for the design of the profiled rod warhead.
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Key words:
- mechanics of explosion /
- detonation diriving /
- air resistance /
- profiled rod
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图 5 爆轰作用后异形杆模型及速度分布矢量图
Figure 5. Model of profiled rod after detonation and distribution of velocity vector
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